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bt.cpp

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    RelayStateGenerator.cs 1.40 KiB
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Security.Cryptography;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace Sustainsys.Saml2
    {
        /// <summary>
        /// Generator of secure random keys..
        /// </summary>
        static class SecureKeyGenerator
        {
            private static RNGCryptoServiceProvider random =
                new RNGCryptoServiceProvider();
    
            /// <summary>
            /// Create a unique random string with a cryptographically secure
            /// random function.
            /// </summary>
            /// <returns>Random string 56-chars string</returns>
            public static string CreateRelayState()
            {
                // 16 is considered secure, but Base64 pads 16 bytes so
                // use 18 to make it even with Base64 that encodes multiples 
                // of 3 bytes)
                var bytes = new byte[18];
                random.GetBytes(bytes);
    
                return Convert.ToBase64String(bytes)
                    .Replace('/', '-')
                    .Replace('+', '_');
            }
    
            /// <summary>
            /// Create a unique random array with a cryptographically secure
            /// random function.
            /// </summary>
            /// <returns>20 random bytes.</returns>
            public static byte[] CreateArtifactMessageHandle()
            {
                var bytes = new byte[20];
                random.GetBytes(bytes);
    
                return bytes;
            }
        }
    }